Feather edging and shank reducing machines



June 13, 1961 C. H. JAMES EI'AL Filed July 18, 1958 7 Sheets-Sheet 1 Invenfmm Cyril HJames 5:8 LianeZ W6. Wilkinson By their Aftorney 7 Sheets-Sheet 2 June 13, 1961 5C. H JAMES ET AL FEATHER EDGING AND SHANK REDUCING MACHINES Filed July 18, 1958 3 Ni 5 2 3w June 13, 1961 c. H. JAMES ETAL FEATHER EDGING AND SHANK REDUCING MACHINES Filed July 18, 1958 7 Sheets-Sheet 3 June 13, 1961 c. H. JAMES ETAL FEATHER EDGING AND SHANK REDUCING MACHINES Filed July 18, 1958 7 Sheets-Sheet 4 June 13, 1961 c. H. JAMES El'AL FEA'I'HER EDGING AND sx-umx REDUCING MACHINES Filed July 1a, 1958 7 Sheets-Sheet 5 June 13, 1961 c. H. JAMES EI'AL FEATHER EDGING AND SHANK REDUCING MACHINES Filed July 18, 1958 v '7 Sheets-Sheet 6 c. H. JAMES ET AL 2,987,739

FEATHER EDGING AND SHANK REDUCING MACHINES 7 Sheets-Sheet '7 June 13, 1961 Filed July 18, 1958 Fig]! p 2,987,739 Patented June 13,1961

United States Patent Omce FEATHER EDGING AND 'SHANK REDUCING MACHINES Cyril Harry James and Lionel William Gayton Wilkinson,

Leicester, England, assignors to United Shoe Machinery Corporation, Flemington, N.J., a corporation of New Jersey Filed July 18, 1958, Ser. No. 749,397 Claims priority, application Great Britain July 27, 1957 3 Claims. (Cl. 1286.5)

This invention relates to improvements in machines for beveling the margin of a work piece and is illustrated herein as embodied in a machine of the ,type commonly employed in beveling the margin of a shoe part'such as a sole, for. example, to be subjected to either a feather edging or shank reducing operation or both.

It is an object of the invention to provide an improved machine, capable of performing either 'or both of the above-mentioned operations, wherein the work piece is progressively presented between work supporting and presser rolls to a knife which may'readily be variably positioned in either, of two positions for purposes of making a cut of two diiferent depths in the same work piece, the knife also being mounted to tilt and to have its tilting so controlled that the width of the cut will be uniform notwithstanding variations in the thickness of the work, and the edge thickness of the work will be unaffected by the tilting of the knife.

A further object of the invention is to facilitate the movement of the knife between and locating it in its different positions. The knife is moved into its lower position, in the illustrative machine, by an operator-controlled mechanism the movement of which is limited in both directions by a pair of adjustable stop members, one of which determines the lower operative position of the knife and the other of which may be set to determine an upper operative position of the knife or, if desired, an inoperative position of the knife above the upper surface of a work piece in the machine. Provision also is made for normally biasing the knife into its upper position to which the knife is thus automatically returned when the operator relieves the pressure employed to move the knife into its lower operative position.

The above and other objects'and features of the invention are attained in an illustrative machine shown in the drawings and will be more fully understood from the following description of the machine and the appended claims.

In the rawings,

FIG. 1 is a front elevation of an illustrative machine embodying the invention;

FIG. 2 is a side elevation of the head of the machine as viewed in the direction of the arrow in FIG. 1;

FIG. 3 is a plan view of the structure shown in FIG, 2;

FIG. 4 is a sectional elevation of the knife andits mounting, the section being taken along the line IVIV ternative presser roll structure and mounting therefo'ry FIG. 8 is a sectional front elevation of the structure 7 shown in FIG. 7, the section being taken along the line G FIG. 9 is an elevation the upper portion of the machine (from which the head has been omitted), as viewed from the right, showing a two-speed driving mechanism and treadle operated structure for controlling the presser roll and knife;

FIG. 10 is a rear elevation of the structure illustrated in FIG. 9;

FIG. 11 is a front elevation of the two-speed driving mechanism shown in FIG. 9; and

FIG. 12 is a sectional elevation of the structure shown in FIG. 11, the section being taken along line XII-XII.

' The illustrated machine comprises a frame 10 mounted upon a base 12 (FIG. 1) the top of which, as viewed from the front of the machine, slopes downwardly to the left at an angle of about 45, the base being mounted upon a column 14 which stands upon the floor. In the frame 10 there is mounted for rotation about a fixed axis a work supporting roll 16, above and to the left of which a presser roll 18 is mounted for yielding movement toward and away from the roll 16 in a plane perpendicular to the top of the base 12. A work piece, the margin of which is to be beveled, is fed by and between the rolls 16, 18 against a knife 20, provision having been made for moving the knife into a lower operative position by depressing a treadle 22 which is pivotally mounted upon the column 14 at the bottom thereof. If it is desired to elevate the presser roll 18, to facilitate presentation of a Work piece to the machine, this can be done by depressing another treadle 24 which, like the treadle 22, is also pivotally mounted upon the bottom of the column 14.

The work supporting and presser rolls 16, 18 are driven in opposite directions and at either of two speeds through a two-speed driving mechanism 26 (FIGS. 9-12), normally at the higher speed, but at the lower speed, to facilitate the guidance of the work, whenever a third treadle 28, pivotally mounted upon the column 14 at its base, is depressed.

The illustrated machine is adapted, in one of its modes of operation, for making a continuous bevel around the margin of an outsole for a shoe, the out being made deeper in the shank portion of the sole, if desired, than elsewhere. This combined operation is commonly known as feather edging and shank reducing. In another mode of operation of the illustrated machine, it is adapted for performing a beveling operation of limited length, in the shank portion of a sole, when the sole .is to receive a shank reducing operation only.

In the first instance, the knife 20 is normally held in an operative position above the roll 16 suitable for performing the feather edging operation and, whenever the shank reducing operation is to be effected, is lowered into a lower operative position by depressing the above-mentioned treadle 22. Upon release of the treadle, the knife 20 is automatically returned to its normal operative position.

In the'other above-mentioned mode of operation of the machine, the presser roll18 and the knife 20 are normally above a work piece placed upon the roll 16 but are lowered, bringing the presser roll into feeding engagement with the work and the knife 20 into its operative position, by depressing the treadle 22 which, upon being released, allows the knife and presser roll to return to their original positions thereby terminating the beveling i operationand the feeding of the work.

*end of a shaft 30 (FIGS, 2 and 3) which is rotatably nountedin the frame liland has keyed upon its rear end a gear 32 (FIG. 9 which is a m of the drive mechanism 26, the latter also being carried by the shaft 30.

4 of. an inch per iron).

lug 74 indicate the angular position of the knife.

The presser roll .18.is mounted upon the forward end of a shaft 34 (FIG. 2) which is rotatably mounted in an arm 36, the arm being mounted to swing in a plane pershaft 30 and the former being either fixed upon the shaft 34, or splined thereon, as will be explained later.

The arm 36 is urged downwardly, to cause the presser roll 18 to hold a work piece against the work supporting roll 16, by a spring 44 the forward end of which abuts a -screw 46 for adjusting the compression of the spring, the

rear end of the spring being seated against a shoulder which is formed upon a portion of the frame which overhangs the arm 36. The distance of the presser roll '18 above the roll 16, when no work is between the roll,

'is varied by means of a screw 48 which is threaded in the arm 36 and engages the frame 10. To indicate to the operator the spacing of the rolls, an indicator lever 50 pivotally mounted at 52 on the frame 10 is arranged to swing along a scale 54, on the frame, which is graduated to show the gap between the rolls 16, 18 in irons (i.e., Mounted in the forward end of the lever 50 is a pin 56 which is received in an inclined slot 58 formed in the arm 36. Accordingly, any heightwise movement of the arm 36 will result in movement of the lever 50 to a point along the scale 54 corresponding to the distance of the presser roll 18 above the feed roll.

' 16. Ordinarily, the presser roll 18 will be set above the roll 16 a little less than the thickness of the work to be operated upon so that the entrance of the work between the rolls may be effected without requiring the presser roll 18 to be raised.

,may tilt at different angles to the periphery of the roll 16 crosswise thereof. The axis of the stem 63 intersects the knife edge close to its inner end, for a purpose to be pointed out later. The holder 62 is biased clockwise (viewing the holder from the right) by a spring 68 which is stretched between a lug 70, projecting upwardly from the holder, and the arm 66. The above-mentioned movement of the holder and knife may be adjustably limited by a stop screw 72 which is threaded into a lug 74 .on the arm 66 and is adapted to be engaged by the lug 70. Graduations on the holder 62 and an index mark on the To permitthe knife 20 to be raised and lowered with respect tothe roll 16, and thus to control the depth of cut of the knife, the arm 66 is mounted to swing at its rear end upon the above-mentioned spindle 38, such movement of.

thearm being under the control of mechanism, next to be described, by which the knife may readily be set in and moved between two variable operative positions.

Formed upon themid portion of the arm 66 (FIG. 4)

" is a slotted yoke 76 in which is received for sliding movement lengthwise of the arm a block 78, the latter being bored to receive an eccentric 80 formed upon a shaft 82 which is mounted to rotate freely in the frame 10. It

'will now be evident that, upon rotating the shaft 82, the ,heightwise position of the knife 20 above the roll 16 is varied. Such movement of the knife is effected by op erating the above-mentioned treadle 22, which is connected to the shaft 82 by the following connections.

A lever '84 is fixed at one end upon the shaft 82 and is pivotally joined at its other end to the upper end of a rod 86. This rod is also pivotally joined at its lower end to a lever 88 (FIG. 10) which is fixed upon a-shaft 90 rotatably mounted in the base 12. Another lever 92 fixed 7 upon the shaft 90 is connected to the treadle 22 by connections comprising a chain 94 and an adjusting member 96, so that when the treadle is lowered the knife also will t 4 A "e be lowered through the action of the eccentric within the block 78. The knife is biased away from the roll 16 by a spring 98 which is stretched between the column -14 and a stirrup 100 having therein a pin 102 which is adapted to be received in either of two notches 104, 106 which are formed in a lever 108, the lever being fixed upon the above-mentioned shaft 90.

By the above-described connections, the knife 20 is normally biased upwardly into a predetermined position under the control of an arm 110 (FIG. 4) fixed upon the left-hand end of the shaft 82, which arm seats upon a stop surface 112 on a stop 114 which is mounted to swing freely upon the shaft 82. The stop 114 is positioned angularly about the shaft 82 by means comprising a plunger 116 the lower end of which is serrated to mesh with a similarly serrated segment 118 which is fixed upon the frame 10. Similarly, the lowermost'position of the knife is determined by the engagement of the arm 110 with a stop surface 120 on a stop 122 which, like the stop 114, is rotatably mounted upon the shaft '82 and is adjustably locked in any desired position by a plunger 124 similar to the plunger 116. Each plunger is biasedinto engagement with the segment 118 by a spring 126 and can be retracted therefrom to permit any desired angular adjustment of the associated stop, in accordance with the desired depth of cut of the knife 20. The alinement of the serrations on the plungers and segment is maintained, when either plunger is retracted, by tongues 127, 127 on the plungers which are received in complemental recesses formed in the stops 114, 122. The'edge thickness of the sole for any setting of the knife is indicated by a pointer 128 on the arm 110 and graduations, in irons, formed upon the segment 118.

In order to prevent the knife 20 from being raised into engagement with the presser roll'18, should the stop 114 be set too far to the left (FIG. 3), a stop screw 130 is threaded into 3. lug 132 on the arm 36, over a lug 134 on the arm 66, so as adjustably to limit the upward movement of the knife relatively to the roll 18, independently of the stop 114. Another function of the stop screw 130 will be described later.

The presser roll 18 may be raised at any time, at the will of the operator as, for example, when the portion of a work piece upon which a limited beveling operation is to be started, is presented to the knife, this being accomplished by depressing the above-mentioned treadle 24. This treadle is connected by a chain 136 (FIG. 9) to one arm 138 of a bell crank lever having another arm 140 in which there is threaded a screw 142. The bell crank 138, 140 is pivoted at 144upon the base 12 with the screw 142 opposite to a projection 146 which is integral with an extends downwardly from the arm 36.

The presser roll 18 may have either of the types of construction and mounting which are illustrated in FIGS. 6 and 7. .In the construction shown in FIG. 6, the roll comprises four disks 148 which are bored freely to receive a splined sleeve 150. With these disks there are used two other disks 152, 154 which are splined to the sleeve 150 and, therefore, aredriven by the sleeve, the disk 154 being provided with a knurled periphery. All the disks are held upon the sleeve 150 by a washer 156,

'having a radial slot 158 (FIG. 5), and a screw 160 freely between the washer 156 and the end of the arm 36. A positive driving connection between the sleeve 150 and the shaft 34 is provided by a pin 162 which is fixed upon the shaft and is received within a slot formed in the sleeve at its inner end.

The presser roll 18 may comprise any desired number of disks, according to the desired width of the roll, and may have any desired distribution of-idler and driven disks according to the requirements of the operation being fingers caught between the rolls.

performed. Whenever the number of disks in the presser roll 18 is changed, it is necessary only to substitute a sleeve 150 of the appropriate length, if assemblies of disks already fitted with an appropriate sleeve are not provided. 1 The presser roll mounting illustrated in FIG. 7 avoids the use of the sleeve 150 described above and permits any selection of disks, whether idling or driven, to be assembled upon the shaft 34. In this instance, the shaft '34 itself is splined, fits freely within the bores'of idling disks 148 and positively drives a splined disk, such as the serrated disk 154. In this construction, the shaft 34 is provided with a key 164 at its rearward end which slides within a keyway in the gear 40 and the latter is restrained from movement axially of the shaft 34 by an eccentric stud 166, which is threaded into the arm 36 and is received within a peripheral groove 168 formed in the hub of the gear 40. The shaft 34 is positioned so as to provide a close but free running fit of the disks 148, 154

between the washer 156 and the end of the arm 36 by a finger 170 which is received in any of a plurality of grooves 172 formed in the shaft '34 with a spacing equal to the thickness of the disks. The finger 170 is pivotally mounted upon a stud 174, threaded into the arm 36, to swing within a slot formed in the side of the arm into and out of operative relation to the shaft. The finger is biased toward the shaft by a spring operated detent 176 slidably mounted in the arm 36.

In order to control the angle of the edge of the knife relatively to the work supporting roll 16, crosswise of its periphery, as well as to prevent the outer edge of the knife from engaging the presser roll 18, there is provided a knife stop 178 (FIG. 5) which is pivoted at 180 upon a head 182, the latter being formed upon a stud 184 holding the latter in adjusted position.

The work piece is pressed against the work supporting roll 16, immediately off the outer end of the presser roll 18, by a presser 192 which is fixed upon a spindle 194 which is mounted for axial adjustment and to rotate freely in the arm 36. The presser 192 has a rearwardly extending arm 196 which lies immediately to the left (FIG. 5) of another arm 198 which is fixed upon the spindle 194 by a screw 200. Upon a pin 202 carried by the upper end of the arm 198, there is pivoted a screw 204 which freely passes through a shoulder 206 on the arm 36; and a spring 208 compressed between this shoulder and a nut 210 threaded on the screw 204 biases it toward the left and causes the work engaging end of the presser 192 to be urged toward the roll 16. A stop screw 2 12, threaded into the arm 198 and adapted to engage the arm 36, adjustably determines the lower position of the presser. A lock nut 214 threaded on the screw 212 holds the latter in adjusted position. The presser 192 is thus arranged to yield upwardly with any desired resistance, obtained by varying the compression in the spring 208, from its normal position which is determined by the setting of the screw 212.

Secured upon the front end of the spindle 194 is a guard 216. This guard extends across the feed roll and not only assists the operator in presenting a work piece between the work supporting and presser rolls but also reduces the likelihood of the operator having his The guard is long enough to span the widest feed roll and both the stud 184 and the spindle 194 are long enough to permit the knife stop 178, the presser 192 and the guard 216 to be set tioning the edge of the sole at the axis of rotation of the stem 63 of the knife holder by theuse of an edge gage 218 (FIGFZ) which is fixed upon the frame 10, between the work supporting roll 16 and the frame, with the .work engaging face of the edge gage tangent to the axis of the stem 63. The work engaging surface of the edge gage, as viewed fromabove, is well rounded to permit considerable turning of the sole in its plane, according to changes in the contour of the sole edge and, to permit such unobstructed turning of the work, the arm 36 and the frame 10. are .so formed and arranged as to provide a gap of considerable extent extending rearwardly of'the' machine from-the edge gage. a a

The shaft 30, upon the forward end of which the-work supporting roll 16 is mounted, carries at its rearhpo'rtion the abovementioned two-speed drive mechanism 26 (FIGS. 9-12) A pulley 220 rotatably mounted upon the shaft 30 is driven by a belt 222 which is connected to an electric motor (not shown) mounted within the column .two integral gears228, 230, each of these gears having twenty teeth. The gear 230 meshes with a gear 232, having twenty-one teeth, which is formed upon a sleeve 234, the latter being mounted freely to rotate upon the shaft 30. A gear 236 rotatably mounted upon the sleeve 234 and having twenty-two teeth meshes with the abovementioned gear 228, the gear 236 having a disk 238 formed integrally therewith and provided with a series of ratchet teeth. 7 A similar ratchet disk 240 is fixed by means ofv a key 242 upon the forward end of the sleeve 234. The ratchet disks 240 and 238 can be selectively immobilized by bringing toothed blocks 244, 246, respectively, into engagement therewith, these blocks being fixed upon a lever 248 which is pivoted at 250 upon the rear side of the base 12. A spring 252 normally biases the lever 248 so as to cause the block 244 to be held in engagement with the ratchet 'disk 240. When the pulley 220 is rotated, carrying the shaft 224 around with it, this shaft is rotated in the same direction as the pulley but, owing to the difference in the number of teeth on the gears 230 and 232, at a speed which is one-tenth of that of the pulley. Under these conditions, the gear 236 and ratchet disk 238 rotate idly.

The lever 248 is connected by an adjusting member 254 and a chain 255 to the above-mentioned treadle 28, so that when the treadle is lowered the leveris swung to bring the toothed block 246 into engagement with the ratchet disk 238, the ratchet block 244 now being. moved away of the shaft 30 will be 90 r.p.n1., and the lower speed of the shaft will be 45 rpm.

The use and operation of the machine will now be summarized, first with reference to the performance of a combined feather edging and shank reducing operation upon a sole. Assuming that the sole to be operated upon is of about 10 irons in thickness, the screw 48 will beset to position the presser roll 18 above the supporting roll 16 -7 somewhat less than this sole thickness, so that the sole will be readily fed between the rolls upon beingpresent between them. An appropriate setting of the presser roll in this instance would be made when the indicator lever 50 is opposite the 9 iron graduation on the scale 54. Assuming further that the sole is to have an edge thickness around the forepart of 9 irons, the stop 114, against which the arm'110 is normally biased, is set so that the pointer 128 is opposite to the 9 iron graduation on the segment 118. If the edge thickness of the sole in the shank is to be, for example, 2 irons, the stop 122 will be set so as to limit movement of the arm 110 to the right (FIG. 2) to a point where the pointer 128 is opposite to the 2 iron graduation on the segment 118. The knife stop supporting roll 16 and its edge is long enough to extend forwardly of the presser roll underneath the knife stop 178 and rearwardly somewhat beyond the work engaging surface of the edge gage 218, so as to insure that the knife will completely remove a marginal strip of material from the sole. The number of disks in the presser roll will be selected according to the desired Width of the cut to be made.

i The heel end portion of a sole to be operated upon is now presented between the rolls16, 18 and when the heelward end of the shank portion of the sole closely approaches the knife 20, the operator depresses the treadle 22 whereby the knife is lowered into its lower operative position (as shown in FIG. 2) which is determined by the engagement of the arm 110 with the stop 122. The shank reducing operation now proceeds until the junction of the forepart and shank is reached, at which time the operator releases the treadle 22 and the knife 20 rises, under the influence of the spring 98, until the arm 110 engages the stop 114. The knife is now set to produce the desired sole edge thickness for the feather edging operation which is carried out around the forepart of the sole.. When the junction of the forepart and shank at the other side of the sole is reached, the operator again depresses the treadle 22 to cause the knife to be lowered so as to produce the lesser edge thickness required by the shank reducing operation, the depth of the cut of the knife again being under the control of the stop 114 fwhich is engaged by the am 110. When the rearward end of the shank is reached, the operator releases the treadle 22, permitting the knife to rise to its original operative position, and withdraws the sole from between the rolls 18 and 16. The abruptness with which the change is made between the shank reducing and feather edging operations is controlled by the speed with which the Q operator depresses the treadle 22 or allows it to rise.

Because the position of the forward edge of the knife,

heightwise of the work supporting roll 16, is under the control of theknife stop 178, the width of the cut will remain substantially uniform regardless of changes in the inclination of the knife edge with respect to the roll 16 caused by the rising and falling movements of the knife. Moreover, the edge thickness of the sole will be unaffected by changes in the angular relation of the knife to the roll 16 because of the fact that the axis about which the knife tilts (i.e., the axis of the stem 63) intersects the 7 work engaging surface of the edge gage 218.

When the machine is used for the performance of a shank reducing operation only, the machine may be provided with a :knife having an abruptly upturned contion, is disposed slightly abovethe work; and the stop .8 122 will be set so as to permit the knife to be lowered enough to produce the desired edge thickness for the shank reducing operation. The screw 48 will be backed off, allowing downward movement of the arm 36, under the influence of the spring 44, which is limited by the engagement of the stop screw 130 with the lug 134 on the knife arm 66. The stirrup 100, which before was set with its pin 102 in the notch 106 in the lever 108, is now set so as to bring the pin 102 within the outer notch 104, whereby the knife arm 66 will be biased upwardly by the spring 98 with suflicient force to overcome the downward bias exerted upon the knife arm by the arm 36 under the influence of the spring 44. The knife stop 178 may be set for the type of knife last described so that the knife edge lies substantially parallel to the work supporting roll 16, when the knife is in its operative position as determined by the engagement of the arm 110 with the stop 122. s

The various adjustments for the machine now having been made and with the knife 20 and presser roll 18 in their raised positions, the operator presents a sole between the rolls 16, 18. The operator then rapidly and fully depresses the treadle 22 and the presser'roll, which now partakes of the downward movement of the knife arm 66, is brought into engagement with the sole first. Immediately thereafter, the knife 20 is brought into engagement with the sole. Although the downward movement of the feed roll is arrested upon its engagement with the sole, downward movement of the knife continues until it is arrested by the engagement of the arm 110 with the stop 122 by which the edge thickness of the sole throughout the shank reducing operation is determined; When the shank reducing operation is to be terminated, the operator releases the treadle 22 and, under the influence of the spring 98, the knife 20 and presser roll 18 are lifted away from the work.

The machine is also adapted for uniformly beveling a sole margin to a constant edge thickness over its en tire periphery or any portion thereof. For this purpose, the presser roll 18 may be provided with two driven disks, the inner one being knurled, and a collar smaller in diameter than the disks will be provided between the knurled disk and the arm 36 to provide a gap for the reception of a presser, such as the illustrated presser 192. The edge of the knife 20 is set in the desired angular relation to the roll 16 by means of the screws '18 is adjusted heightwise, by means of the screw 48,

to provide a gap between it and a work supporting roll 16 which is a little less than the thickness of the work ,piece, so that the work piece may readily be presented to the machine without requiring the treadle 24 to be depressed by the operator.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a shoe machine having a knife and cooperating work supporting and pressure rolls between which a work pieceis presented to said knife to bevel the margin of the workpiece, in combination, a carrier for said knife, said carrier being movable in opposite directions to vary the position of said knife toward and away from said work supporting roll and to vary the depth of cut'of the knife, mechanism for operating said carrier comprising means for biasing said carrier in one direction to hold said knife away from said work supporting roll, operator controlled means for moving said carrier in the other direction to move said knife toward said work supporting roll, and stop means for adjustably limiting the movement of said carrier in both di rections.

2, In a shoe machine having a knife and cooperating work supporting and presser rolls between which a work piece is presented to said knife to bevel the margin of the work piece, the combination of a carrier for said knife, said carrier being movable in opposite directions to transfer said knife between positions at different distances fiom said work supporting roll, a support for said presser roll, said support being movable toward and away from said work supporting roll, means for biasing said support toward said work supporting r011, stop means between said support and carrier for limiting movement of said support relatively to said carrier toward said work supporting roll, operator controlled means for depressing said carrier to cause said knife to be moved into its lower position with respect to said work supporting roll, and means for biasing said carrier in the opposite direction with a force exceeding the opposing biasing force imparted to said support, and means for adjustably limiting movement of said carrier in both directions.

3. In a shoe machine having a knife and cooperating work supporting and presser members between which a work piece is fed to said knife to bevel the margin of the work piece, the combination of a yieldable mounting for said presser member, a carrier for said knife which is movable to Vary the position of said knife toward and away from said work supporting member thereby to vary the depth of cut of the knife, said knife being '10 rotatably mounted in said carrier to tilt about an axis intersecting the edge of the knife at one side thereof so as to Vary the slope of the knife edge with respect to said work supporting member, a knife stop carried by said mounting and arranged to engage the knife at its other side, means for biasing said knife about said axis against said stop whereby said knife is tilted in response to movement of said presser member toward and away from said work supporting member, means for operating said carrier to cause the tilting axis of said knife to be moved toward and away from said work supporting member whereby the depth of cut of the knife is varied, and means for adjustably limiting the movement of said carrier in both directions whereby two operative positions are provided for said knife at dilferent distances from said work supporting member.

References Cited in the file of this patent UNITED STATES PATENTS 1,080,191 Baxter Dec. 2, 1913 1,101,538 Hadaway June 30, 1914 1,173,375 Norden Feb. 29, 1916 1,964,674 Pizza Jan. 26, 1934 2,094,120 Fossa Sept. 28, 1937 2,506,399 Vincent May 2, 1950 2,509,721 Brown May 30, 1950 

